Question: What is the starting time for Aleksandr Lyapunov who has educated as Saint Petersburg State University?
Paraphrase: What is the beginning time for Aleksandr Lyapunov who has taught as Holy person Petersburg State University?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q310788 p:P69 ?s . ?s ps:P69 wd:Q27621 . ?s pq:P580 ?value}